Mechanism for operating and locking windows.



P. ANDREOTTA. MECHANISM FOR OPERATING AND LOCKING WINDOWS.

APPLlCATlON FILED NOV. 27,1917.

Patented Jan. 21, 1919.

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P. ANDREOTTA.

MECHANISM FOR OPERATING AND LOCKING WINDOWS.

APPLICATION FILED NOV.27| I917- 1,292,2%2 Patented Jan. 21,1919.

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UNITED srans area onnron.

PROSPERO ANDREOTTA, OF BROOKLYN, NEW YORK.

MECHANISMFOR OPERATING AND LOCKING WINDOWS.

To all whom it may concern.-

Be it known that I, Pnosrnno ANDREOTTA, a subject of the King of Italy, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Mechanism for Operating and Locking Windows, of which the following is a specification.

This invention relates to windows, the invention being more particularly related to means for operating and locking window sashes in connection with their easements.

A main object of the invention is to provide window sashes and their incasing frames with means by which the sashes may be easily and readily moved into any position desired, by which they may be automatically counterbalanced in any position into which they are moved, and by which, finally, they may be rigidly locked in the position into which they are moved.

A further object of the invention is the provision of simple, comparatively inexpensive and eflicient mechanism whereby window sashes can be readily operated and locked, the mechanism employed being of such character that it can be readily installed by helpers or unskilled workmen, and also that the same will not interfere in any way with the removal and replacement by unskilled labor of the window sashes at any time.

With these objects and others in view, the invention resides in the details of construction and in the combination and arrangement of parts hereinafter described and shown in the accompanying drawings, forming a part of this specification, and in which Figure 1 is a view in front elevation of a window, illustrating in particular in dotted outline the positions of my actuating and locking means, parts of the window being broken away'and part being shown in section.

Fig. 2 is a view in side elevation, illustrating in dotted outline the application in part of my improved operating and looking means.

Fig. 3 is a cross sectional view, taken in the direction of the line 3-3 of Fig. 1.

Fig. 4 is a detail view of the locking mechanism, the same being taken in the direction of the line 4-'4 of Fig. 3.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Application filed November 27, 1917. Serial No. 204,198.

Fig. 5 is another detail view of the look ing mechanism, the same being taken in th direction of the line 5-5 of Fig. 4.

My improved operating and locking mechanism may be used in connection with any ordinary type of window frame and vertically movable sashes, although it will be noted, as will hereinafter appear more fully, that in order to accommodate various parts of the mechanism, one of the window jambs must necessarily be a hollow structure, and that the, confronting sides or faces of the upper and lower window sashes on their opposite side corners must be provided with suitable recesses for the accommodation of the sash actuating parts.

With more particular reference to the accompanying drawings, the numerals 10 and 11 denote, respectively, the usual upper and lower sashes, which are arranged to slide vertically between the window jambs 12and 18, the sashes being guided against lateral displacement in the usual way by any suitable guides, strips or moldings as 14. i

The confronting faces of the sashes 10 and 11 on their opposite side corners, are provided with angular cut-out portions or recesses as 15, which extend the entire length thereof. Secured upon the walls of these recesses by screws as 16 or other suitable means, are rack bars as 17 provided with the usual teeth as 18. Theserack bars are of the same Width as the recesses 15 and extend through the entire length thereof.

One of the window jambs as 12, is made of hollow construction having a longitudinal passageway 19. Extending across this passageway and journaled for rotation in suitable bearings as 20 provided in the jamb on each side of the passageway, are a pair of parallel shafts 21 and 22, which project for a distance into the longitudinal recesses 15, as best shown in Fig. 3. These shafts are journaled at the place where the top cross member of the lower sash overlaps the lower cross member of the top sash, as will be seen by an inspection of Figs. 1 and 2, there being one shaft for each sash. Fast upon these shafts in the recesses 15, with their teeth in mesh with the racks 17, are the gears 23, through which, when the said shafts arev rotated, the sashes 10 and 11 may be moved'vertically and independof the sashes being movable upon similar gears 24 in mesh with the racks 17 on that side, which gears are fast upon the studs 25 rotatably secured in the jamb 13.

Fast upon the shafts 21 and 22 in the passageway 19, are the sprocket gears 26 arranged out of alinement in order that, because of the limited size of the passageway 19, the two endless chains 27, one for each sash, in mesh with said gears 26, may not contact with each other in movement. These endless chains are mounted around other similar sprocket gears as 28 of which there are two pairs, one pair near each end of the passageway 19, arranged for rotation upon shafts as 29, as best seen in Fig. 1.

Thus I mount for movement in the passageway 19 the endless chains 27, each operatively engaged with the sprocket gears 26, and each provided upon its outer side with a weight as 30 in order to counter balance the sashes 10 and 11, it being noted in this connection that as the sashes are closed, the counterbalancing weight for the upper sash 1O approaches the lower end of channel 19 while the counterbalancing weight for the lower sash 11 approaches the top end of the same.

Also rigidly fast upon the shafts 21 and 22 in the passageway 19 and out of alinement with each other, are the gears 31. FiXedly projecting into the passageway 19 from the jamb wall 12 above the gears 31 in a vertical plane lying between and parallel to the vertical planes of the shafts 21 and 22, is a stud 32 upon which are pivotally mounted the angular locking arms 33, each of which terminates in a toothed head 34, adapted to mesh with a gear 31, it being noted in thisconnection, as best seen in Fig. 4, that these arms 33'project in opposite directions from the stud 32 so that the heads 34 are adapted to mesh with the gears 31 upon opposite sides thereof. Also rigidly projecting from the jamb 12 is abracket 35-terminat1ng in a head 36 above the gears 31, which head is provided with a transverse eye 37 through which passes a screw 38, journaled in the jamb 12 ateach side of the passageway 19, in a plane traversing the planes of the shafts 21 and 22, and extending between the locking arms ihis screw 38 is differentially threaded, being provided-adjacent one end with righthand threads as 39 and near the otherend with left-hand threads as 40, the same being operable in the appropriately threaded fittings 41 and 42, respectively, which are held. against lateral movement by a rod 43 secured in the head 36 and slidably engaging the eyes as 44 provided inthe fittings 41 and 42. By this arrangement the fittings 41 and 42 are moved longitudinally of the screw-38, towardor away fIOIlI each other accordingly as said, screw is turnedto. the right or. to-the left" Inorder to. cause. the

screw 38 to turn without moving longitudinally, I prefer to provide its medial portion within the head 36 with a peripherical groove 45, into which projects the end of a thumb screw 46, threaded vertically in the head 36. In order to operate the locking arms 33 when the fittings 41 and 42 are actuated by the turning of screw 38, I provide the said fittings, each with a pin as 47, which projects through an oblong eye as 48 suitably provided in the heads 34. In view of this arrangement, itwill be obvious that when the longitudinally immovable screw 38 isturned in one direction, the heads 34- will' be drawn out of engagement with the gears 31 unlocking the shafts 21 and 22 and consequently the sashes 10 and, 11 for movement; and conversely, that when the said screw is turned in the opposite direction the said heads will again be forced into engagement with said gears, locking the said shafts and consequently the window sashes against movement. For the convenient rotation of the screw 38, I rigidly pin thereto on the outside of the frame, a thumb button 49.

Having thus described my invention, what I claim is 1. In a device of the'class described,a pair of rotatable shafts disposed in parallel relation, a gear fast upon each shaft, a pair of pivoted locking arms formed with toothed heads adapted to engage one with each gear, and mechanism including a reversely threaded screw operatively combined with said locking arms by which simultaneously to move them into and out of engagement with said. gears, and means for operating said screw.

2. In a device of the class described, a pair of parallel rotatable shafts, a locking gear fast upon each shaft, a pair of pivoted looking arms formed with toothedheads adapted to engage one with each locking gear, a fitting pivotally engaged with each toothed head, and means reversely threaded connecting said fittings by which to cause the same to move toward and away from each other to effect the simultaneous engagement and disengagement of the toothed heads with said locking gears.

3. In a device of the class described, a

hollow member constituting-part of a Window jamb, a pair of parallel shafts journaled in said member transversely thereof and adapted. to be operated by the movement of a window sash, a locking gear fast upon each shaft within said member, a. pair of locking arms pivot-ally supported adjacent said'locking gears and formed each with a toothed head adapted to engage a locking gear, a fitting pivotally connected with each head, a reversely threaded screwrconnecting said fittings, means for locking said fittings against lateral movement, and means operable from. the outside, of the, member for turning said screwtqeffeet through; said. fittings the simultaneous engagement and disengagement of said toothed heads with said locking gear.

4. In a device of the class described, a pair of parallel rotatable shafts, a locking gear fast upon each shaft, a pair of locking arms pivotally supported adjacent said looking gears and formed each with a toothed head adapted to engage a locking gear, a bracket support having a head, a rod engaged with said head, a fitting loosely engaged with said rod on each side of said head, a reversely threaded screw connecting said fittings and assing through said head, means for pivota ly connecting said locking 15 arms with said fittings, and means connected with said screw for turning the same by which to efliect the engagement and disengagement of said toothed heads with said locking gears.

In testimony whereof I have name to this specification.

PROSPERO ANDREOTTA.

signed my copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

